Alarm system for vaults



May 17,1927. 1,629,347 E. G. LAWRENCE ALARM SYSTEM Fon VAULTS- Filed March 9, 1925 6 Sheets-Sheet 1 y E. G. LAWRENCE ALARM SYSTEM FOR VAULTS GASheets-Sheet 2 Filed March 9. 1925 -57h/@PJ 6150119761166 M 17 1927. v ay E. G. LAWRENCE ALARM SYSTEM FOR VAUIJTS Filed Maron 9. 1925 6 Sheets-Sheet 3 ifm "fw/4 May mm?. 1,629,347

E. G. LAWRENCE -ALARM SYSTEM FOR VAULTS Filed March 9. 1925 e sheets-511%@4 4 1,629,347 May 17 1927 E. G. ITAWRENCE ALARM SYSTEM FOR VAULTS Filed March 9, 1925 e sheets-Sheet 5 /Z *fw May 17 1927. 1,629,347

- E., G. LAWRENCE ALARM SYSTEM FOR VAULTS Filecl March 9. 1925 6 Sheets-Sheet 6 [ffm ,Eoin/dra ah/61766 3" or devices designated by t, names, to wit: a timed clock-driven contact,

Patented Mey 17, 1927.

41,629,347 UNITED; STATES PATENT; oF/FICE;

EDWARD G. LAWRENCE, E

MINNEAPOLI-S, MINNESOTA, ASSIGNOR T0 O. IB.

MccLIN'rocx co., A JconronA'rIoN oEMINNEsoTA. y

ALARM .SYSTEM Eon vAUnrs.

Application inea Maren, s, 1925. serieu No. 14,112.

My invention provides an improved burglar-protecting system especially adapted for application to or in connection wbith bank vaults, safety deposit vaults, and the like,

and, generally stated, it consists of the novel ments, such as the following, may, however,

be made to advantage. The system is duplex in its character in that it protects against closing of normally open circuits and opening of normally closed circuits, andthe arrangement is `such that tampering with the one type of circuit does not put theother type of'circuit out of protective action. e

The 'completesystem involves -instruments lthe following idle combination tumbler, trip and reset relay, electrical alarm gong, combination reset relay, cut-out signals, automatic cut-out and reset, balanced relays, -vibration bell, and automatic test bell.

lIn the accompanying drawings, which illustrate the invention, like characters indi-l cate like parts throughout the several views.

Referring to the drawings: Figs. 1 and 1;11 are supplemental diagrammaticv views illustrating `a more 'complete v embodiment of the invention,and which l two views are adapted to be 'placed together to makeup a4 complete diagram;

Fig. 2 is a detail in vertical section showing portions of a combination lock such as used in bankyaults and showing also a co- ,operating so-called tumbler-actuated com- 0- binat-ion contact;

Fig. 3 is a horizontal section on the line 3% of-Fig. 2; l

Fig. 4 is a plan view of the combination L. contact shownin Figs. 2 and 3;- a YFig-..5 is a plan view of a` device herein designated as the combination reset relay-;

Fig. 6 is a horizontal section on the line e-e of Fig.5; c

Fig. 7 is a vertical section on the line,y 7-7 of Fig. 5;

Fig. 8 is a plan view showing one of the balanced relays and an associated bell or vibrator;

Fig-9 is a side elevationL of a device herein designated as the .cutout signal;

Fig. 10 is a frbnt elevation of thecut-out' signal shown in Fig. 9;

Fig. 11 is a vertical section taken on the line 11-11 of Fig. 10; Fig. 12 is a vertical section taken on the line 124-12 of Fig'. 10; t

Fig. 13 isa view partly in plan and partly.

in horizontal section, showing van instrument herein designated as the automatlc cut-out and reset;

Fig. 14 is a side elevation of the instru-v ment shown in Fig. 13, the case being removedtherefrom; and

Fig. 15 is a fragmentary section onv the line 15-15 of Fig. 13, some parts beingv broken away and some parts being removed.

In the diagram views Figs. 1, and 1a, certain instruments or devices will be indicated as entireti'es by the following designations,- to wit:

sho

The character A indicates a timed or clock-driven contact; B,l indicates the idle .tumbler of a combination lock such as usedr in bank vaults, safes. and the like;`,C indicates an instrument known as a tripand reset relay,fpreferably such as known to the trade as the Kellogg trip and reset relay;

D indicates an electrically actuated alarm' i gong of any well known or approved construction; E indicates an instrument herein designated asv .the combination reset relay;

F indicate? instruments herein vdesignated vas the cutout signals; F', F2 and 'F3 indicate cut-out signals very similar to the cut-out signalsF, but connected and-used,

1n somewhat different ways; G indicates an instrument herein` designatedl as the automatic cut-out and reset; H and H' diagraln'fl matically trically actuated bell or vibrator, which per-v `forms aI highly important function in connection with the balancedrelay H; and J indicates a test bellA used in connection with the cut-out signal.F". I

indicate balanced relays such as the Jewell or ,Weston;. Ioindicates an elec- Of the instruments or devices above just noted, vA, B, E, F, F', F2, F3, H, I and J will be located within the vault, while the devices C, D and H will be located jin the alarm gong housing at the exterior of the .vault, and usually located high up outside l lo - metallic contact segment 18. The insulating of the bank or buildingin which the vault .is installed.

A. As Shown, the timed or clock-driven contact A is in the form of a wheel or disc carried by a shaft 16 thatr is driven, at the rate of one complete rotation each twentyfour vhours, from a sultable clock mechanisin, which, preferably, will be an eightday clock. Said Contact is shown as provided with .a peripheral segment 17 of 1nsulating material and is provided with a B.- The idle tumbler B of the combination 1 lock has a peripheral notch 2() that cooperates with. the dependingv end of an oscillatory contact blade 21. This blade 21 normally stands out of engagement with and midway between two spaced contacts 22l and 23.

C. The trip and reset relay CY-is of well knownconstruction and, hence, for the purposes of this case, it is only ydesirable to describe thejsame briefly as comprising the A following: The numerals 24 and 25 indicate,

respectively, the trip and reset magnets. thereof, which mayv be assumed to have a resistance each of one hundred ohms.

- tact 31, and when moved downward, it will engage the free end-of a lower contact 32. The contacts 31 and 32 are directly connected but the contact 30 is normally electrically'disconnected kfrom the contacts 31 and 32.

D. The electrically actuated alarm gong times to the said magnets 3 and 38.

The. numeral 26 indicates. a spring-retracted ar- -cated below the lever 45;

D, las stated, may be of any suitable construction, but, as shown, it comprises magnets 33 and the usual lvibratory armature 34 and gong proper 35.

As already stated, the tripand reset relay C and the alarm gong D will be placed in a suitable housing outside of the vault. Within the housing that contains the said devices C and D, there will also be placed a battery 36, which may be assumed to be a twelve-volt battery.

p E. The combination reset relay, as shown, comprises two electromagnets 37 and 38, the former; of which mav be assumed to have a'resistance of seven ohms, while the latter will-have a resistance of but .three ohms.

The numeral 39 indicates an intermediate pivoted armature that is sub'ect at dierlelnt e armature 39 serves as .'a conductor and cooperates with ixed cnntacts 40-40 land 41-41.

F and F. Each cut-out-signal F and F', in the simple form diagrammatically illustrated, comprises an electromagnet 42, which may be assumed to` have ten ohms resistance. Said magnet, as shown, on a plate 43`0 insulating material. The numeral 44 indicates an armature that normally stands in a vertical position, as shown, for example, in Fig. 1a, but which is adapted to be drawn to the lett when the magnet 42 is energized. This armature 44 has a hooky like free end that normally engages under al shoulder of alever 45 and holds said lever raised and in engagement with an electrical is mounted contact 46. At its free end, the lever 45 carries a segment or indicator plate or card 47, which, when dropped, gives a signal indicating that the circuits have been' tampered with. Said lever 45 and plate 47 will be dropped when the armature 44 is drawn to the left, so that its hook-like end moves into a vclearance notcih'or bulge formed in.

said lever 45.

F2. The cut-outsignal F2 identical with the cut-out signal F and the corresponding elements are marked with the same numerals. In this-arrangement, however, the contact 46a, which corresponds somewhat to the contact 46 of the cut-out signal F,\has slight vertical movement and is connected to an insulating block 48 from which projectsl a contact blade 49. 'In this dev-ice, there is also a lower contact 50 loand` when the magnet 42 is energizedV- and the level' 45 drops, the contact ,46 will move downward slightly with said lever until the contact 49 engages an underlying contact 51, and under further downwardmovement, said lever 45 will leave the contact 46a and come into enagement with the lower Acontact 50.

is or may be prises'a disc or wheel 52 that is spring or motor-driven in a clockwise direction in respect to Fig.' 2 and has a lug 53 project: ing from itsperiphery. The Wheel 52 is carried by a shaft 54` which also carriesl a`gear 55 and a radiating contact arm 56. As shown in said diagram view Fig. l,

. the gear 55 'meshes 'with an intermediate gear' 57 which, in turn, meshes with a gear 58 that Acarries a speed-retarding fan blade 59. The said gears 55,57 and 58 are'complete gears and the mechanism just described i is really a clock mechanism, the preferred 4 contact 62. The magnet coil 61 may tbe.

arrangement of Awhich will be hereinafter fully described. '.The numeral 60 indifatesl and preferably has a resistance of ten ohms. For holding said lever 60 temporarily raised, so as to release the clock mechanism, and in electrical engagement with the contact .62,-

there -is shown a gravity-'held latch dog 63, the hook-like end of which works through a perforation in said lever 60 with its free end arranged to be engaged by the lug 53 of theI Wheel 52. The shaft 5.4, and hence the revolving contact 56, are electrically connected to the armature lever 60 by a wire The outer end of. the Contact 56,

slightly before the mechanism of the cut-out (Jr is stopped in the position shown in Fig.

la, is arranged to engage a relativelygxed contact blade 65.

H; and H. The balanced relays H andl H are of the same construction and each may be assumed to be` a Jewell or Weston v balanced relay. `O the elements thereof,

itA is only necesary for the. purposes of thiscase to note the enclosing case4 66, the electromagnetic controller 67, relatively fixed spaced contacts 68`and contact needle 69. The controller 67 is connected on opposite sides to binding postsV 70' and 70a. The needle 69 is connected to the binding post 71 and the contacts 68 are both connected to a binding post 72. As shown, the binding post 70 is connected to another binding post 73. by a high`resistance coil L' The vibratory bell I is connected on one side'to the fixed -contact 50 by a wire 75. and on its other side, said bell is connected to a wire v76 that leads to a source of current supply'presently to be noted.

The vertically movable contact 49 1s connected to the binding post 70a of the balanced relay H', through a lead 77, in which, as shown, a rheostat 78 is interposed.

The numeral 79 indicates a battery, preferably of about one and one-half volts pres? sure` which, onl one side, is connectedfto the binding` post 70a of the balanced relay H and on its other side is connected to the fixed contact 51 through a lead 80 in which a rheostat 81 is preferably interposed. The numeral .82 indicates the lead and the numeral82a indicates oneof the conducting elements of the vault winding and which lead, as shown, is connected between the binding post ,70? of the balanced relay H and one side of the battery 7 9, the said latter connection being made throughthe rheostat 81.. The lead 82, as shownl includes a pro# tectve winding 82h that is incorporated in the housing that contains the devices C, D, H and 36. v The binding post 7 3 of the bal--v anced relay H isconnected by a lead 83'to the binding post 70 of the balanced relay H', 'and the binding post 70 of the relay H is connected byfa lead 84 to the binding post 7 3 of the relay H,jall as shown in Fig. 1f.

The battery 79- and rheostats 78and 81, 'it

will be understood, of course, are within the vault.

Located within the vault, there is a further important element, topwit: a battery 85, which may be and preferably is a sixvolt' battery.

General' scheme of wiring, illustrated v n Figs 1 uml 1a. i

The outside battery 36, on the positive side, is connected by a lead 86 to the intermediate contact 30 of the trip and reset relay C, and the negative side of said battery nis connected by alead 87 to one side of the .electromagnets 33- of the gong D.

At theirother sides, said magnets 33 are connected by a lead 88.to the two relatively fixed contacts 31 and 32 of the relay C.

The coil of the magnet 42 of the first or combination cut-out signal F is connected on one side to the cooperating armaturef44 and on the other` side is connected by a lead 89 to the shaft 16 and contact segment 18 of the timed or clock-driven contact A. The

the `other sides are connected by a common lead 90 to one side of the trip magnet 24 of thetrip and reset relay C', said connection, as shown in the diagram view Fig. 1a, being made through the contact 19. The common lead 90 is also connected to one side of the coil of the magnet 42 ofthe modified cutout relay F2, the other sideof said coil being electrically connected to the vertically movable contact 46a The 4binding post 71 of the balanced relay H is, by a lead 91 and framework of vthe cut-out relay F2, electricallyT connected to the Larinature44 and to the lever 45.

It may now be noted that the lead 76, be-

fore described, extends andi is connected tothe positive side of the `six-voltl batteryy85.

l From the negative side of the battery 85 extends a grounded or negative battery lead 92, which, by an extension lead 92a, is con-v nected to `the binding post. 12 oft-"the balanced .relay H. The bindingV post 72 ofthe balanced relay H', (which latter,' f it will be remembered, is located inthe outside housiing with the alarm gong D and battery 36),l tis, lby a lead 93, connected to the negative side of said lbattery 36, said connec ion, as

j reset relay- C', and by a `branch lead 94a, .is

-30 of said instrument C. The branch lead connected to the' intermediate contact blade 94a directly connects toithe lead wire 86,'

which latter, in turn, as -already noted, is connected tothepositive side vof the twelvevolt battery 36.- The negative side of the coil of the trip magnet 24 is connected by a lead95 to the fixed contact 62 'of the automatic cut-out and reset G and now it 'may be noted that said lead 95 4is connected by a lead 96 to the binding post 71 of the balanced relay H',

The extended arm of the bell crank armature 26 of the trip and reset relay C carries a contact 97 that is insulated vtherefrom and normally out of engagement with a relativefixed contact 98. The negative Lside of battery 85 is connected by a lead99 to the contact 97 and to the negative side of the coil of the reset magnet of the trip and reset relay C. The positive side of the coil maglill net 25 is connected by a lead 100 to the contact brush or blade of the automatic cntout `and reset Gr.v i The contact 98 is connected by a lead 101130 the negativeside of the coil of the magnet 61, the positive side of said 'coil being-connected .to the positive side of the battery throughv a lead 102. The lever 60 and the contact 56 are also connected to the positive side\ of the battery 85 fithrough certain of the leads already described and'through a lead 103.

The vibratory contact blade 21 of the tumbler mechanism B is connected 4to the grounded and negative side of the battery through a lead 104 and lead 92. The fixed contact 23 of the mechanism B is connected by a lead 105 to the contact 46 of the first or left-handcut-out signal F, and by a lead 106 to the fixed upper contact 40. of the combination reset relay E. The fixed contact 22 of the instrument B is connected by a lead 107 to the lower fiXedcont-act 41 ofthe inf'strument E. In Fig. 2, the numerals 106a of a vault, and which contacts `are respectively located in the leads 4106 and 107. One side of the magnet 37 ofthe instrument E is. connected -to the upper xed contact' 41 by awire 109, and the other side of said coil is connected by a lead 110 to the positive side of the battery 85, as shown, through a portion of the lead 94. YOne side of themagnet 38 is connected by a lead 111 to the segment 18 of the clock contact A, and the other side of said magnet 38 is connected by a wire 112 to the lower fixed contact40.

It should now nbe noted that the Contact 46 of the cut-out signal F, (of which .there may be several), .and which latteris under timed control, is provided with a lead 113,

which, as shown, extends to rthefcontact 114 slightly separated `from the grounded lead 92 so as to form gaps 115. This is simply a diagrammatic illustration of the scheme and it will be understood that gaps or openings in the circuit may be provided at various different places and in various different arrangements, which will. normally leave said contacts 46 in open circuits and which open circuits, when accidentally or maliciously closed, as bytampering of the vault, will set the alarm into action, as hereinafter described.

J and F3. As ture, I provide an automatic test device, which gives supervision .over the system and will reliably indicate whether or "not the' various protective devices are in operative condition. Otherwise stated, this test device, as here illustrated, includes an electrically actuated-test bell and the automatic cut-out signal F3, which latter, asL already noted, is in its primary features like the eutout signal F. The test bell, already designated by the letter Jis connected on one a highly important lfeaside by a wire 116 to the oscillatory contact 44, and .the contact lever 45 of said instrument F3. On its other side, the bell J is connected by a wire 117 to a spring contact blade '118, (see Fig. 1a), that is normally out of engagement with a cooperating fixed contact 119, which, in turn, is connected by'a wire 120 to the negative .or lgrounded lead 92.v The Contact blade 118, at its free end,

has a cam lug 121, of-insulating material..

Here it may "stated that, whenever the vault door is either opened or closed, a collar on Vthe door bolt 107a will engage-the cam lug 121 and f'orce the contact blade into engagement with the contact 119.

In the cut-out signal F3, the contact 122,

which corresponds ir some respects to the contact 46 of the instrument F, is connected to an upper contact 123 by a plunger 124 that iso free foi' slight vertical movements in suitable -guides. Normally, the contact 122 rests on the lever 45 and the contact 123 engages the fixed contact 125, which, by "a lead 126, is connected to the positive side of the battery 85. through a portion of the lead 76.

The lead wire 101 is connected by a wire 127 to one side of the coil of the magnet 42 of the cut-out signal F3, so that said magnet 42 is connected in multiple with theK magnet 61 of the automatic cut-out and reset G, so that the said two magnets 42 and' 61 will be vsimultaneously energized when the switch contacts 97 and' 98 are engaged, and will be dev-energized when said contacts 97 and `98 are separated. l t

4 n A t Operation. f

lThe several instruments preferably used are of somewhat complicated form, the details of which would be diiicult to keep in mind while rst getting thiJ general scheme of the operation, and these will, therefore,

be described more in detail after first tracing the operation of the mechanismfand arrangement' illustrated in the diagram views,

Figs. 1 and 1a, which illustrate the several instruments diagrammatically and in somewhat simplified form.

Figs. 1 and 1a illustrate .the'normal conditions of the several instruments, that is, the conditions that exist when` the system is in order, is under protection of the various different devices, and the several devices are at rest but ready to cause the sounding of an alarm whenever the system is in any wa tampered with.

ere it may be stated vthat the cut-out signal F will be operated only when the combination lock is'tampered with during a timethat the system is under protection from the clock A, that is, vduring the interval of time that the conducting segment 18 is in contact with the fixed contact 19; that the cut-out signals F and F2 will he operated at all times, erther day or night, and irrespective of whether or not the clock contact A is operating under` its protectingperiod and l that the cut-out signa1sF3. will be operated whenever any one of the cut-out signals F, F andF2 are operated, for the reason thatthe said cut-out F3 andqbell J are connected in multiple with all of the said other cutolit devices.

i Combination lock protection.`

'. of the oscillatory contact 21 will loefv freev within the notch 20 and said contact 21 will then be midway between the contacts 22 and 23, so that said contact 21 will then be in an open circuit. If, however, the tumbler B is moved slightly: in either direction, theL contact 21 will'be engaged either with the Contact 22 o'r 23. As is well known, a combination lock cannot be operated without oscillating the tumblers first' in one direction yand then in the other, and anyv such attempted manipulation must of necessity cause the contact 21 to engage the contact 23, and this will. close the multiple circuits 'as follwsr-From the grounded or negative lead 92 through-the lead 105contact 46, lever 45, magnet coil 42, and lead 89, to the clock-driven Contact A; andfrom said contact 23 through the lead 106, door bolt 106",

lever 39, lead 102, magnet 38, lead 111,. and aportion of said lead 89, also to they clockdriven contact A. If, at the time when said contact 21 was moved into engagement with the contact 23, as just stated, the conducting segment 18 of the clock-,driven Contact Was then in engagementy with the contact 19, then the two multiple circuits above just traced in part will be tive side of the battery 85 as follows:

connected to the posi- Through the leadV 95a 95, Vmagnet 24, and

lead 94, to the positive side of said battery. This will close thecircuit through the magnet 42 of the instrument F, the magnet 38 of the instrument E, and the magnet 24 of the instrument C, but since the said magnets 38 and 42 are. in series with the nagnet 24 and the latter has the relatively high resistance of oner hundred ohms the current lowing through the magnets 42 and 38 will not be suicient tov operatively energize the same, but will be suiicient to energize said magnet 24. When the magnet I24 is ener n gized, it draws the armature 26 and, through.

the link 27, lifts the latch-acting contact 28 and releases the spring-retracted armature 29. When the saidl armature 29 is released, its insulated head 29- moves out 'of engagement with the central contact-30 and the latter, under its own. spring tension, will This closes the circuit vfrom the battery 36 through the magnets 3 3- of the alarm bell D and causes thesounding of r.the alarm.

When ther magnet 24-was energized and as just above noted,

portionf the 1ead'94f When the magnet 61 is thus energized, it raises th,e. lever 60, thereby releasing.. the speed-retarding blade 59 move into engagement with the contact 32.

61 of the automatic cut-out and and therebyv releasing the clock mechanism. A

Lifting -of the lever 60 as just stated also engages the lever 60 with the fixedl contact 62, thereby ,short-circuitingl the ma net 24 and throwing. al1 of the energy oft e battery 85 through the magnet 42 of the cutout'signal F and through the ymagnet 38 of the combination reset relay E. When the magnet 42 of the instrument F is thus energized, it draws the armature-44 toward and .drop the Acontact 10,5 andv the dropped lever 45.

When the magnet 38 is energized as just stated, it moves the lever 39 into the dotted instrument line position shown in Fig. 1"?, thereby breaking the circuit between the c.ontacts`4040,l

and electrically connects the contacts 41-41 ation .it connects -the contacts 41 so that the so that the circuit between -the latter willie lsubsequently closed in a manner presently lbe noted. When the magnet 42 'of thecutout signal-F was energized as stated and the cooperatinglever 45 was dropped, it broke the circuits through' said magnet 42 of the F, through the magnet 38 of the instrument E, and through the magnet 61 o f the instrument G, and through the magthe magnet 61 was de-energized, the lever 60 net 24 of the instrument C, and the said magnets were instantly de-energized. When dropped far enough to break the contact 62,

but was caught by the dog 63 -and' held slightly above the position in which it interi normal yposition .shown inv Fig. 1,

cepts the movement of the clock-driven blade 59. When the magnet 24 was de-energized, the armature 26 was vinstantly restored to the thereb breaking the circuit between the contacts-9 and 98 and causing the latch-acting lever 28't0 move down into a position to catch the armature 29, which latter, however,- for the time being, remains in a position to the ri ht of that shown in Fig. 1. x v

t will be assumedthat the clock mechanism vis timed 'so that the clock-driven. wheel 52 is arranged to be given one rotat1on` in fifteen minutes. When the Wheel 52 has been rotated slightly less than'ifteen minutes, thel rotating contact 56 will` be brought into engagement with the contact and this, for a very short intervaloftime, will close the circuit through there'set maghet 25 of the instrument 'C as follows: from the positive side of the battery through a portion of the lead 94, leads 02, 103 Aand 64, to the contacts56 and 65, and rom t ence through the lead 100 to the magnet 25 and from the magnet 25 d back to. the battery` through the leadv 99. When the reset magnet 25 Was thus energized, vit pulled thearmature 29 backto the position shown,-

in Fig. 1, in which position it will be again:

. secured by the latch lever 28, and movement of said armature back to lnormal position restored the contact 30 to its neutral position, therebybreaking the circuitY througz',h' the alarm bell and stopping the action there- I of. This, as it will noted, gave an alarm' during a eriod offlfapproximately fifteen' inmediately after the co'nta'ct' is moved out oflen a ement withthe contact 65, the 1u 53 e te disc 52 kwirillenga e the lower en -ofA the latch'v 63 and, therey 'cause the same to drop the'lever 6() sothat the contact' 23, which action will necessari `'f1-,caesar g l 'l the latter will then intercept rotation of thek v blade 59 and stop Vthe clock'mechanism with the parts in the positions shown in Fig. 1.

It may now lbe understood that, when the 'lever 59 was moved from its full line position .into fits dotted line position, Fig. 1%,2 as

above described, it was in what may be termed a cut-out posltion, but in which positact 21 to 'engage the eontact'22. When thev reset magnet '37. is energized, it vmoves the armature 39 back to the full line, position,

so'that the'alarm willbe again setinto action just as above described, if the contact 21 is thereafter moved into engagement with l. followI any attempt towork the combination lock B. Attention is ,further called to the fact that, while the sounding of the alarm by manipulation of the lock can ytake place only during the protected period controlled.

by the clock, the resetting df the armature 39 can ytake place at any time.- Otherwise stated, the circuit through the contact 23 must be through the clock-controlled, contact, i whiley the circuit through'th'ev Contact 22 is not through the Iclock-,controlled contact.` `From the foregoing,

it follows that if' a burglar, for example, Ishould set off' the valarm through the contact 23,v as above describedfand shouldescape and later return to again tam er with -thesafe or vault, he would find th ready to indicate any further tampering.

As alread indicated,there may be any `desired num er of cut-out'sig'nals F. 'This d instrument F' is' in an open circu1t,wh;ch`

includes the Gap-115. This gap 115 may be assumed ,to be 'the space' between the ele-l ments of the vault .wall or of the vault door,

such as the ,usual spaced plates, and it-may be 'here stated' that kthe cut-out signal F will be` operated whenever thefsaid gap 115 is 'electrically closed' by any means whatsoever, such,`f'or example, as the use of a drill.

When the gap V115/ is closed, the circuit A 24 ofthe tripand relay` through the magnet ized andthe above de- .reset C Will be ener ngfD., automatic cut-out and reset G,

action as above described, will be re eated except that,- in this instance, it will e the lever 45 of the cut-out signal F that will be xdropped; but in this action, the combination reset relay is not brought into action. The

lattentionfis called tothe fact that the magicoA e protecting systeml set and scribed operations o the said instrument C, n

j saidinstrument E operates only in connec- Y jtlon with-.the contacts 21,Y 22 and 23. Here nets 42, ofthe cut-out signals F andFz are vconnectedto the-positive side of the battery 86,--as shown,'through` the leads 90, 9,5, 95,

j 'been' dropped.

. vault against breaking of normally closed Contact 19, and magnet 24.A Of course, it follows from what has been said that, when the magnet-,24 of the instrument C is ener-' gized by) closing, of the gap 115, the gongv will be se't into action andwill, under the action ofthe timed automatic cut-out and reset G, be sounded for 'a .period of fifteen minutes and .then cut out of action. y The levers ofthe cut-out signals F, F2 and F 2 all require to be reset by and, and under operations so far described, the

levers 45 of the instruments F and F have' Droppingf of the lever 45 ofthe instrument F does not throw the combination'lock lprotection out of actionr because of the action of the combination' revset relay E, but when the lever 45 of the instrument Fv is dropped, it is temporarily outI against closing of normally open circuits@ The instruments F2, H and H protect the circuits. These' normally closedA vprotecting circuits incorporated in the vault liningsk are protected by balanced relays and cooper` ating devices arranged to lcause vthe alarm to be sounded whenever any of the closed circuits are either 4shorted or broken or, in fact, whenever the 'current maintained in the closed circuits is materially increased or.

decreased. From this it follows that, if the battery supply current to the normally closed circuits should be rundown or be removed, .or if\ a battery of, a higher voltage should be substituted, the alarm devicecwill be thrown into action. The arrangement whereby the' above noted action -will take placek may be made clear'by the following illustrations t j Suppose, for example, that the vault lining lead 82 be broken. Normally, of course, the .relays H and H )are balanced, one

against the other, so that the oscillatory contacts 69 of both will be in neutral positions, that is, midway lbetween the .contacts 68. 'Vhen the lead 82 is broken, the current How. from the battery/7 9 through the electromagnetic controllers 67 of the 'two relays will cease and the pointers 69 of both relays will move against the low side contacts 68, there by closing the. circuits as follows: from thev negative lead 92a through the instrument H, thence through the lead 91, the lever 45 of the instrument F2, through the plunger contact `462, through the coil 42 of the instrument F2 and to the positive side of the battery 85 through the leads 90, 95, coil-24 of the instrument C and thence through the lead 94 to the positive side of said battery 85. By this action just noted, the magnet V24m? the trip and reset relay C w-illv be energjzed',l and by actions already described,

the gong D will be set into action. Simultaneously with-the action just described', the

contact 69` of the balancedrelay-Hv closed the circuit through-themagnet 24 andbattery 36, soI that the magnet 24 is,f-by the actions just (described, simultaneously connected with both batteries and 36. These two independent actions, Vsimultaneously r'performing the same function, would 'not be necessary except for the fact that .the cable might be cut, in which case,-the battery 85- could not close the circuit through the mag,- net 24, for it will be remembered that lall of those parts illustrated QnFig. '1 are'foutside of the vault and preferably'within an alarm housing outside of the bell; while all of those parts on Fig. 1a are within the vault and, of course, the leads connecting the 'parts inside of the vault with those otside of the vault will naturally be carried in a cable. With the two balanced relays, one within the vault and one outside of the vault, the Amagnet 24 of the trip and reset relay C will,'if the cable -should be cut, beenergized by the battery` 36, which kis within the alarmhousing.P Of

course, when themagnet 24 is 'energi'zed by y actions resulting from the breaking of the lead 82, as just described, the trip and reset relay C will operate iii the manner already several times described'and-will sound the alarm D and set the automatic cut-out and reset Cr into action with the resulting operations previously described, and which will energize. the coil 42 of the cut-outsignal F2 at the same time that the magnet 6l of the instrument G is energized. lVhen the said magnet 42 is ene'rized, it draws the cooperating armature 44 to the left, thereby causing the 'lever 45 to drop into engagementwith the underlying contact' 50. VVhen the level- '45 drops, the contact 46a will move slightly downward but will not follow vthe lever 42 so as to maintain contact therewith,but the contact 49 will dropv onto the contact 51. -Engagement of the lever. 45v with the contact 50 starts thevibration bell I into action. Engagement of the contact 49 with the contact 5l bridges the gap assumed to be made in the lead 82 by Substitutingthe le'adl77, Irheostat 78, and lead 8O for the broken lead;

` and'this allows the relay to come back intobalanced position, so that the alarm will be cut out of action at the end of fifteen minutes when the clock-driven disc 52 of the instrument Gr completes its rotation andfagain comes back into the position shown in Fig. 12;

The balanced relays are very delicate instruments in which the contacts are quite likely to stick, when brought intor engage- 5, be sulicient to prevent sticking of the contacts of these relays and, hence, as a convenient vibration producer, I have used a small electric gong or bell I located closely in the vicinity of the relay H and which, to increase the efficiency thereof, is attached to the back ofsaid relay as shown in Fig. 8. The relay His located so closelyin the Ivicinity of the main gong D that its contacts will be prevented vfrom sticking 'by vibrations produced by said gong. From the description given, it is, of course, understood thatbothor1 the said bells I and D.will be set into action substantially simultaneously with the operations or' the respective relays H and H', so that they will perform the important functions stated.

As 'several times indicated, the levers 45 .of the several cut-out signals F, F, F2 and F3 must be reset manually.` They must, however, be simultaneously reset and, in practice, it is the custom to provide a common device Vfor simultaneously resetting all thereof, that is,- for lifting the same back into positions inI which they ,will be caught and held, as shown in Fig. 1a, by the cooperating hook-acting contacts 44.

It will be remembered that the magnet- 42 of the cut-out F3 is connected in multiple with the magnet 61 oftheautomatic cut-out andmzreset G,` so that the said two magnets will be simultaneously energized and simultaneously de-energized. It shouldalso be recalled thatthe circuit of the magnet 61 is arranged to be closed when the armature 26 is moved by the energized magnet 24, and that the circuxit of said. magnet 24 will be closed in one of the three waysindicated,

to wit: by engagement of the contacts 21 and 23 of the instrument B, by'closingof the gap 115 of the instrument F', orby disturbances either by way of increase on decrease of current in the blancedrelays H and H. It is now important to cdnsider that the magnet 42'of the instrument F3 will be en- Y ergized and the cooperating lever 45 will be dropped whenever the magnet 61 is energized through any one ofthe three sources just above recited.

It will now be noted, by reference to Fig. 1, that the circuit from the positive to the negative of the .battery 85 through the test bell J is normally closed except between the door-bolt-actuated contacts 118 and 119.

This test bell will be sounded only when all of the instruments F, F, F3, and F3 are in normal conditions, as' illustrated in Fig. l,

and then only when the door of the vault is opened orj closed so as to force the Contact 118 into engagement with thc contact 119, at which time the closed circuit through said te'ry lead 92. If then the test bell J rings,

when the door of the vault is opened or closed, the operator will know that thesystem is in operative condition and that no oneV of the instruments F, F or F3 has been dropped o'r operated. v Y v It any one of the said instruments F, F',

F2 has been dropped or operated and the O actions described have resulted therefrom,l the magnet 42 of the instrument F3 will have been energized simultaneously with the energizing of the magnet 42 of one of the said operated instruments, andif such' has oc-l curred,the Contact .44 of the instrument F3 will have been'moved, the lever 45 dropped,

and the contact 23 moved downwardso as to break the circuit through the test bell J In this event,when the door of the vault is opened or closed, the test bell J will not be sounded and thiswill indicate that the system is ot in complete operative3condition.

When the lever 45 of the instrumentF3 has 23-22 move enough to disengage the contact 23 .from the contact 25, but not far enough to maintain been dropped as just-l stated, the` contacts.

downward therewith 'far engagement between the contactl 122 and the lever 45, and this breaks the circuit throughy the magnet 42 of said instrument F3 so that it can be reset. v

4In Fig.V 2, the, numeral 128 indicates the case of a combination lock, such as used in safe vaults, and in which, of course, the idle tumbler B is located. In this arrangement, the oscillatory contact 21. is attachedwith its other end to the head. offa cylindrical contact support 129mount'ed on the c asef128 andto which the contacts 22 and 23are attached, the said contacts 22 and 23 being, as shown, in the form of nut-equipped binding posts to which the wires 107 land 105, re-

spectively, are attached.

combination resetE shown inFigs. 5, 6 and 7, the numeral 130 indicates a suitable casin which the magnets- 37 and' Various 1n otlgier parts are mounted; -As here lillustrated, the contacts 40--40 and 41--41 are in the f orm of contact `screws applied through bindlng posts 131.- The armature-acting contact 39, as here shown, is in the lform of a spring blade intermediately attached to an armature proper 39 that is intermediately plvoted to a support 132 fand is" directly sub- )ect to the magnets 37 and 38.

Figs'. v9, 10, 11 and 12 illustrate the pire-J ferred construction of the so-called cut-out signals, several of which .are` shown in'Fig'. l0. 'In thls construction, the` lever 45 is 'bi- In, the form of automatic cut-out of the 115 furcated and carries a contact blade 1.33 that normally engaged by thefspring-retracted oted to the bracket 138 and having anarm o that is subject to a resetting plunger 139.

' The automatic cut-out and reset G shown in Figs. 13,` 14 and 15, comprises an enclosing casing 140 within which the mechanism fis enclosed. This mechanism comprises a c which corresponds to the previously desort of clock frame 141, from which the magnet` 61 isrigidlysupported. The disc scribed disc 52, is driven frm a spring motor 142 throughl a chain of gears 143, and said disc, instead -of having a projecting lug, is provided with a notch`53. The disc'52a carries a contact pin 56a that takes the place of the previously described contact 56, which engages the contact 6 to perform' functions already described. he lever 60, which takes the place of the lever 60,. is provided lwith an arm 60", the hooked-end of which normally engages -the fan blade 59a,l which latter corresponds toi the .blade '59. `The arml 60" carriesy an armature' 60 that -is'directly subject to the magnet ,61. The lever 60 has a laterally bent end that normally en gages in the notch 53a. When the magnet 61 is energized, the laterall bent .end of the lever 60 is raised out o the notch 53 l and the hooked end of the.A arm 60 is disengaged from the fan blade 59, so that the motor-driven mechanism is then free for action` to impart rotation to the disc 52a. The numeral 144 indicates a\sort of a "dog that is pivoted to the disc 52a at 145 for limited oscillatory'movement,and is provided with an outstanding lug 146 with "which the-laterally benty end of the lever 60" en ages when :it drops into the notch 53B. en the lever 60a'is raised, the lug 146 falls under the laterally bent end thereof.

and .prevents the samehfrom instantly entering said notch.; When, however, the disc 52 has been given a completerotation, the laterally bent end of the lever 60.1 engages the lug 146 and forces the same backward so that the laterally bent end of said lever may drop into the notch 53a and thus permit I the hooked end of the arm 60b tore-engagev Vthe fan blade 59El and thus .sto the further' rotation of the disc 52 when it as'completed its rotation. 'As shown,- an operating knob j147 and dial 148 are attachedtoand .pro-

jected axially from the disc 52a and are located at the exterior of the casing 140.

The dial ismarked to. indicate the normal position of the disc 52a. Bythe use of the kn`ob 147, a"person on the interior of the vault may rotate the disc 52a so as to reset v the system without waiting for the iifteen minute period of alarm to expire. In summary, the following statements may be pertinent. i

In the above ing of the alarm may be accomplished by closing ofthe lcircuits through the inside battery or the outside battery,l or f both. The contact points may be removed from described systelrglthe sound- 4 either of the 'balanced relaysoand still the alarm yvill sound, thus producing a duplicate set vof vcontacts where they`are most vital. Iy this arrangement, open circuit supervision is givenover th 4closed circuits and closed circuit supervisionA isgiven `over the open circuits. ,l

The battery 79 for the closed circuit is located in the-control cabinet within the vault and should be'of very low potential, say one and one-half volts. Preferably,

lthen, the relays are balanced on two milliamperes, so that the battery consumption. is

Ialmost negligible. The flow of current is from the battery through a rheostat,finside balanced relay, vault linin vault doors,

cables, housing lining,

outslde vbalanced relay, and back'through two wires inthe cable f wlth two resistance coils connected in multiple, onein the housing and the other in ythe control cabinet, and thence back to said- ,battery 79. A fourth wire, such as the lead 77, is used-in the cable" and so arranged that it 'will'automatically replacfethe path dis-'j turbed `by cutting a wire in ,any one part of the linings thus automatically restoring the balanced relay contacts and resetting the system. By this method. the cable is never leftvwithout closed-circuit protection. The sounding of the alarm is, accomplished by either or both of the balanced relays. The contacts on the balanced relay' that is within the cabinet and vault close lthe open \circuit trip through theinside six-volt bat-l tery 85, and the contacts on the outside balanced relay close the open circuit through the outside battery 36.

The automatic vcut-out and reset is made to operate on the principle of a clock movement. Itis Akept in a wound conditonfand is electrically released by closing the contacts controlled by the said trip and reset relay, after and not before the gong is set ringing because -of a tripped condition of the relay, and-the original source o r cause has nothing to do with maintaining the gong in action but is due simply'to a timed action.

-Hence, after`the-gong has once started ringing, it must continue to ring for its full period, irrespective of whether or not the cause that startled its ringing has been.

removed.

Attention should have been called tothe `fact that the normally dormant lead 77 is,

by its rheostat 78, adjusted so that it has the same electrical resistance as does that portion of the normally closed circuit that is cutout when the protecting lead or circuit 82 'is broken. This is important because, when the circuit is directed through said lead 77, the rtwo balanced relays H and H will be restoredv to normal or neutral positions, so that'the resetting of the system can be readily accomplished. lThe importance of connecting the balanced relays, so that the alarm circuit will be closed and the gong sounded by closing of a circuit from the outside battery 36 through the outside balanced relay H, in case the cable leads are cut, will, of course, be readily appreciated. Otherwise stated, the two balanced relays and the inside and outside batteries supply two sources from which the.

alarm may be sounded, and also provide automatic means for replacing the broken protective circuit, so that the system may be reset for repeated action if any other protecting circuit be tampered with. The leads 83 and 84 are connected in multiple with the high resistance coils 74, but in series with the protecting circuits, and this prevents crossing of any of the adjacent wires or breaking of any protecting circuit, such asl the leads 82, 83 and 84, without sounding the-alarm. The inside battery 85, for'the purpose of statement, may be treated as the local battery to distinguish it from the remote or outside battery.

It is thoughtthat the following very condensed statements of the sequence of actions that take place in the system may be-helpful:

Closing of the circuit between 21 and 23, or of the gap 115, or breakingor increasing the pressure in the circuits to H and I-l, closes the circuit throughv the magnet 24, through the magnet 38, andithrough one'or the other of the -magnets 42, but operatively energizes only the magnet 24.

The energized magnet 24 moves the armature 26 and (a) closes the circuit at 30-32,

sounding the alarm D, and (b) closes thel circuit at 97-98, energizing the magnet 61 of the instrument G.

The energizedvmagnet 61 closes the circuit between 60-62, thereby shunting out the high resistance magnet 24 through the leads 99 and 101, throwing the entire current from the battery 85 through the relatively low resistance magnets 42 and 38. The energized f magnet 61, by lifting the lever 60-60`into engagement with the contact 62, starts the timed mechanism G into action.

The energized magnet 42 drops the cof operating lever 45, breaking the circuit through 42, and vthe energized magnet 38 reverses the armature lever 39, breaking the vcircuit through said magnet 38.

Just before termination ofthe fifteen minute alarm period, the contact 56 engages the contact 65, closing the circuit through the reset magnet 25'of the instrument C lby l *drawings are capable of a. large rangeof modification Within the scope of the inveni tion as herein disclosed and broadly claimed.

What I claim is: l

1. In an alarm system, a plurality of normally open protective circuits, an alarm, normally latched means for operating said alarm through successive cycles of predetermined periods, means operated by the closing of any one of "said protective circuits for releasing said latched means, said system also including means for opening the disturbed closed protective circuit at a point other than at the point of first closure and some time during each cycle. l

2. In an alarm system, a plurality 4of normally open protective circuits, an alarm, normally latched means for operating said alarm through successive cycles of predetermined periods, means operated by the 3. In an alarm system, a plurality of nor- 115 mally open protective circuits, any electromagnetic alarm circuit, nbrmall means for opening the disturbed closed pro s E tective circuit at a point'l other than at the point of its rst closure and at sometime durinlg its cyclei Y 4. n an alarm system, a plurality of normally open protective circuits, an electro. magnetic alarm circuit, normally-latched latched means for closing said alarm circuit through means for closing said alarm circuit through successive cycles of predetermined periods, electro-magnetic means operated bythe closing of' any one of said protective circuits for releasing) said normally latched means, said system also including electro-magnetic means for'opening the disturbed close'd prod tective circuit at a pointvother than at the point of its first closure and at some time during its cycle, and reset means operated vby said normally latched means, when the latter is closed and during its cycle of operation,

for cutting said alarm circuit out of actionV v Whlch sa1d resetvdevicc includes an electroand resetting the system for repeated like actions when a second protective circuit is closed. e

5. In an alarm system, a plurality of normally open protective circuits, a normally open electro-magnetic alarm circuit including a gong, normally latched means including an electro-magnetic tripping device and to actuate said tripping device and close the 25 alarm circuit, second to open the disturbed closed protective circuit at a point other 4 than at the point of first closure and at some time during its cycle, and third to open said alarm circuit and operate said reset device to reset said trip device for repeated operation When a second protectiveV circuit is closed.

6.y The structure defined in claim 5 in magnet, aco-operatingvarmature and a. latch for the latter, said armature being yan element that is normally latched and normally holds said alarm circuit open.'

In testimony whereof I affix my signature.

EDWARD G. LAWRENCE. 

